http://www.cs.siena.edu/~scott/instruments contains 8 notes played by each of 23 different instruments. There are 8 tones for each instrument, from C to C, but no sharps/flats. Each note is about a 6-second .wav file (easy to trim to desired length in Python, as I did at the workshop!). Total size of files is 186MB, so you can see why I didn’t email it to you. These were created by a colleague, who says they’re fair game for all to use.

MusicXML has some fun examples for which you can view the XML code, the “printed” score, and listen to the MP3 version. There’s probably a lot more to it that I haven’t used, but I’m just passing it along in case you’re interested and didn’t know about it.